Error: cannot use "k8s.io/api/core/v1".ConfigMapVolumeSource literal (type "k8s.io/api/core/v1".ConfigMapVolumeSource) as type *"k8s.io/api/core/v1".ConfigMapVolumeSource in field value

Symptom:

Related code:
o.pgreplicamaster.Spec.Template.Spec.Volumes = []corev1.Volume{
{Name: "pgreplica-config",
VolumeSource: corev1.VolumeSource{ 
   ConfigMap: corev1.ConfigMapVolumeSource{
    LocalObjectReference: corev1.LocalObjectReference{Name: o.UserSpecifiedCM},
   },
   },
    
},
}
 Compile Error
cannot use "k8s.io/api/core/v1".ConfigMapVolumeSource literal (type "k8s.io/api/core/v1".ConfigMapVolumeSource) as type *"k8s.io/api/core/v1".ConfigMapVolumeSource in field value

Solution:

    Refer VolumeSource k8s doc. ConfigMap suppose to have pointer  *ConfigMapVolumeSource, not value of  ConfigMapVolumeSource , We need to add &.
Meanwhile we can't mix field value and value , refer stackflow link
Correct code is:
o.pgreplicamaster.Spec.Template.Spec.Volumes = []corev1.Volume{
{Name: "pgreplica-config",
 VolumeSource: corev1.VolumeSource{ 
   ConfigMap: &corev1.ConfigMapVolumeSource{
    LocalObjectReference: corev1.LocalObjectReference{Name: o.UserSpecifiedCM},
   },
   },
 
},
}